Claiming back PPI?

After all this stuff in the news about banks and ppi charges, ive decided to give it ago. have shopped around, found a descent firm that will deal with it all for me n they reckon there's a 95% chance ill get this money back due to my circumstances and its no win no fee so i cant really loose also any charges that werent explained to me will be refunded aswell so should eventually be a nice payout.

just wondered if anyone else has done this yet? was it successfull? etc....